Planning the maintenance reserve: how much is enough?

The maintenance reserve — now referred to in German law as the Erhaltungsrücklage — is the financial backbone of every condominium owners' association (WEG). It pays for the upkeep of the common property: roof, facade, staircases, heating system, shared pipework. An association that builds up its reserve steadily can fund major work from its own means, instead of postponing it or scrambling for cash at short notice.

There is no statutory minimum amount. What the law generally requires is an adequate reserve — and what counts as adequate depends entirely on the individual building. That is precisely the challenge: the right figure is not a fixed number, but the outcome of an honest assessment of the property's condition.

What the reserve is actually for

Buildings age on a schedule. A roof, a boiler or an elevator has a finite service life — a major replacement is never a surprise, only a matter of time. The reserve spreads these foreseeable costs across many years and many owners, rather than concentrating them in a single resolution.

Above all, it protects the association's ability to act. When the money is there, a necessary refurbishment can be approved and commissioned as soon as it is due. When it is not, a familiar cycle begins: work is deferred, damage spreads, and the eventual bill is usually higher than timely action would have been.

One distinction matters: the reserve is generally meant for maintaining the common property — not as a buffer for running costs, and not for work inside individually owned units.

Benchmarks: useful rules of thumb, applied with care

Several rules of thumb circulate for setting the annual contribution. The best known in Germany is Peters' formula, which derives long-term maintenance needs from a building's original construction cost and its expected lifespan. Age-based per-square-metre figures, loosely modelled on values from subsidised housing regulations, are also widely used.

These benchmarks have their place: they give a first order of magnitude and make clear that upkeep costs money every year — including the years in which nothing visible happens. But they are not a substitute for planning. A formula knows nothing about the building's actual condition, its backlog of deferred work, or the projects that are realistically coming up.

A property-specific maintenance plan is far more reliable: How old are the key components? What has already been renewed? What is realistically due over the next ten to fifteen years, and roughly what will it cost? Once that plan exists, the right contribution follows almost automatically — and the rule of thumb becomes a mere plausibility check.

What drives the right amount

Two outwardly similar buildings can need very different reserves. The decisive factors typically include:

• Age of the building: the older the property, the closer the big renewal cycles — and the higher the annual contribution generally needs to be.
• Condition and refurbishment history: a recently renovated period building can be in better shape than a neglected newer one. Deferred maintenance acts like invisible debt.
• Technical equipment: an elevator, underground parking, ventilation systems or complex building technology add noticeably to upkeep — they need servicing, inspections and, eventually, replacement.
• Size and construction: the number of units, facade area, flat or pitched roof — the building's design determines which cost blocks arrive and when.
• Foreseeable requirements: energy-efficiency upgrades and ageing pipework are the defining topics for many older buildings and belong in any honest long-term plan.

When the reserve is too low

An underfunded reserve rarely hurts immediately — but it almost always does eventually. The typical pattern: a major repair becomes unavoidable, the money is not there, and the association has to pass a special levy. Individual owners can suddenly face substantial payments that nobody had budgeted for.

Just as often, the work is simply postponed. That buys short-term peace but makes the underlying problem bigger. A leaking roof does not wait for the next owners' meeting, and water damage rarely occurs during office hours. A round-the-clock emergency service helps in the acute moment — but it cannot fix the real cause, which is deferred maintenance.

The value of each apartment suffers too. Prospective buyers and financing banks routinely examine the reserve balance, the association's resolutions and the building's condition. A visible maintenance backlog combined with an empty reserve pushes down both price and saleability — often by more than the saved contributions were ever worth.

The role of the property manager

The owners decide on the reserve by resolution — but the quality of that decision depends heavily on the manager's groundwork. A good manager proposes a well-reasoned contribution in the annual budget, keeps the reserve separate from operating funds, and presents its development transparently in the annual accounts.

Most importantly, the manager supplies the technical basis: regular inspections, an up-to-date overview of the age and condition of key components, and a multi-year maintenance plan. In-house technical expertise pays off here — KF Properties can assess condition and realistic cost ranges directly through its own caretakers and construction team, rather than relying solely on external quotes.

And if the reserve is clearly too low? Then it is the manager's job to say so openly — with a realistic proposal to raise contributions, ideally step by step over several years. That conversation can be uncomfortable. The special levy that otherwise follows is considerably more so.